Originally Posted by JuniorM3
A friend of mine works at a European chip chuning branch.
He gave me a call lastnight....he just received the "motorsport' engine program for my E92 M3.
Now the car backfires on downshifts!!
Fuck! You can really hear explosions in the airbox.!
I have to check the airfilter...maybe it blew off?
Actually i think it's cool!
Anybody else have the same?
I don't see what is cool about it ? You just slightly ruined your ECU soft ...